I'm listening to Matt McGinn recite what sounds like a spoof of John Denver's "Leaving On a Jet Plane"

I've had a few pints and I'm on my way,
Tae Hampden Park, where I'll stand and sway,
And I'll maybe start a barney before hauf time;
I've spilt some beer on one guy's coat,
Another has me by the throat,
I suppose you could say it was time for me to go...

I'm leaving in a police van,
Ah hit a copper wi' a can,
Oh god, whit a way to go.


At various points he goes into a parody of "Raindrops Keep Falling On My Head" and other little ditties. The credit for the verse above is given to "Davidson" and I wondered if a fuller version of the song exists anywhere?